I've been backpacking for quite some time, and gone from self-inflating pads to closed cell foam to the new inflatable pads that are quite popular. I tend to sleep cold, so the warmth from self-inflating pads and inflatable pads is better for me, but I can't seem to get comfortable on the new inflatables. Any best practices out there that are working for you? How do you sleep on an inflatable mattress well?